A woman described as "heavyset" and naked except for her shoes was pulled off the J-Church line on Tuesday morning, and while cops and medical personnel were evaluating her near the intersection of 24th and Church in Noe Valley, she threw off a blanket that had been wrapped around her, walked up on the hood of one man's car, and stomped on his windshield. The man, John Knight, described the crazed woman as about 250 pounds, and he had a lot of explaining to do to his insurance company.